Electric switch



June 5, 1928.

G. R. BROWN ELECTRIC SWITCH Filed Aug. 31. i925 2 .Sheets-Sheet 1 G. R. BROWN June 5,1928.

ELECTRIC SWITCH' 2 Sheds-Sheet 2.

Filed A'g 31, 1926 @607e @ddh/7 @row/1 INVENTOR #h Attorney.

, UNITED STATES GEORGE RUDs'roN BROWN, 0E CRoY'DoN, NEAR SYDNEY, NEW

- AUSTRALIA.,

Patented June 5, 1928.

l 1,671,965I PATENr OFFICE. i'

SOUTH WALES, i

ELECTRIC sWI'ro'H.

Application led August `31,1926", Serial No. 132,715, and in Australia Octoberv 2, 1925.l

rlhis invention'relates to electric switches andrefers to switches of the type in which a cord or the like is utilized vfor operating the switch either tothe on or MTU-position thereof,

Vith reference to thel accompanying drawings in which the inventionv is illustrated, Fig. 1 is a perspective view ofthe switch;

Fig. 2 a lsectional elevation; F ig. 3 a broken plan view; Fig. 4 a perspective view with cover for operative spindle and mechanism associated therewith removed and showing one position ot such mechanism; Fig. 5 a View similar toF ig. 4, but with the said mechanism vin another position; and Fig.l 6 a perspectiveviewof cord carrying pulley.' l

The casing for the switch may vbeof any suitable pattern and 'constructed of any suitable material. It is preferred to construct it of metal having the two parts 1 and 2 with anges 3 and `4 respectively whichmaybe secured together in any desired manner. The part 1 'has a portion. 5 bent'to form a curved lange1'2 tor a' tube '6 or a pipeor thelike through' Which'electric lead wires may be carried for connection to the electric conductive plates 7 and 8. A support plate 9 with screw-'threaded kopening tor the tube 6 is fitted by screws 13 vto theportion 5 and flanged plate 10, one of the flanges 11- of which abuts the flange 12 of the portion 5 of the lpart 1 of the saidlcasing. The part 2 of y the latter may be provided with a boss 14 to whichv a tube 15 may be attached for lead wires to be carried to the point 'at which electric current is to be supplied. 16 extends Afrom the plate 10 towards the bottom of the element 52 and its oppositeL ends may be secured to the plate 10 and said element 52 by any preferred means; such shield serves thepurpose of preventing contact oit the lead wires within the switch casing with operative mechanism of the switch also within said casing. l

Associated with the electric conductive plates 7 and 8 is the movable electric conductive contact platei 17 which is suitably attached to the arcuately movable element 18 having extension 19 to which one end of the coil spring 2O is attached, the other end of said spring being attached to the element 52. The element 18 also has an extension 21 to which one end of the link rod y22 is pivotally connected; the other end of such rod 22 is pivotally connected to one end of an- A shield d other link rodL 23whose other end is attached by suitable means to the arcuately movable member 24. yThe element 18 and the member-24 are turnableon spindles carried by the switch casing. *The part 1' of thelatter has Van opening in onesidethereof to permit the member `24 to* partly project therethrough. f

Exteriorly of the switch casing and adapted to be detachably attached to one side vof 'the part `l "of lsuchy casing is the casing 25 open at one end. The latter casing may be attached to the saidfpart 1 by means of the bolts 26 and butterfly nuts 27. The other end of the casing 25 has an opening therein and fitting such lopening is the boss of a crank disc 28. About the said opening in they casing 25 and securedto the end o'f the 'said casing in which is said opening is the plate 29, also the bos'sed disc 30. The latter has projectingv from oneace thereof a stop 31.

In the plate 29 is a bearing opening for one end of the rotatable spindle 32, such spindle l also having the' screw-threaded portion y33 whereby -the crank disc 28 is attachable rFixedto the-latter by a split pinl or otherwise i-sthe disc 39 having projecting fingers 40and 41 arrangedat 180O apart and loosely mounted von the spindle 32 is the pulley 42 to which one end of an operating cord 43 or the like is attachable; for this purpose the l pulley 42 may be notched as at 44 and the cord secured in such notches and thereafter carried around the boss 45 o thepulley.

Aiiixed to the pulley 42 is the plate 36 havl p ing a projecting tooth 47; the pulley 42 also carries a projecting lug 48. The loose end of the cord 43 may be allowed to extend yany suitable distance from the pulley 42. Between the bosseld disc and the pulley 42 is the coilL spring 49vone end of which is attached to the plate 29, casing-25, and the disc v30, and cthe other end thereof to the pulley 42 and pla-te 46; such spring 49 .is adapted `to keep the pulley 42 in propernrelation with the disc 39 whereby the tooth 47 oi' the plate 46 mayengage with thc fingers'40 and 4 1 of such disc 39 and also to permit automatic reverse rotation of the pulley 42. ,Stops l50 and l in the switch casing are providedl for the link l p.

ln operation, when the cord 43 is drawn on .the pulley forwardly lrotated and vin rotationthe projection .47 on the Plat@ 46 iS b .leusllt 111120 engagement .with either the iingcr 4(1) or the linger 4l ojl the disc whereby ythe latter also caused Xto partly rotate. Such rotation of the ,pulley 42 vand part .rotat-,ioii of lthe disc 39 may be continued until one side of the stop member fk5 en the .Pulley 42 engages one side of ,the stop member 3l on the plate 30; yduring suoli partial rotation. l.ot the disc Af5.9 the spindle 82 is rotated together with the crank disc 28 Willits pin 34 wlierebyihe framing 35 is .ar- 4cuately lmoved to simultaneously arcuately move lthe ineinber24 and thus .the links 23' and 22. together with the element 18 Awhereby the :electric conductive contact plate '17 is 4moved kto either on or olf position thereof `in relation t0 the electric conductive Stationary plates -7 and 8, the spring 2O operating to lsnap home tlie plate 17 n reliltonto the on or oli position thereof. l

Upon jtensionlbe'ing released from the lcord 43 the `springkl) automatically returns the pulley 42 to .normal position by reversely rotating it `u ntil its motion is stopped by vthe Othersid@ of .the ,Stop 48 meeting the other .side ofthe stop 31 .Of .the bossed v.disc 30 and the tooth 47 slidingpast cit-her the finger 40 or the linger 4]. oi' the disc 3 9 to return ,to normal position, whereby it will b e ready for re-engagement with the linger 40 or the finger 41 depending upon the position yof such fingers. vThe disc 39 in every movement thereof :by the pulley 42 receives a part. rotation of 180o; said movement ol. the disc 39 being etlectedin one ,case by the tooth 47 ,engaging with the linger 40 and in the other case by such tooth :engaging with the linger 4 1.

The position off the links 22 and 23 when the plate 17 is in on position is ,shown in full lines vin Fig. 2 and when the plate -lZ is in oil position the `disposition of r.tl-ipe linls 22 and and 23 is `as shown in dotted lines 1n `the same gure.

lt will be understood that the .construe f of the switch casingmaybemodiiied to Ythat shown in the drawings and described hereinand that the arcuately movable parts whereby .the said cord is .readily atttclllble f Ato and detachable from the pulley. v

2. An electric .switch in vwhich the ,operating mechanism comprises a yspindle .supported in Secondary ,casing det-,acliablysecured to Ithe main switch ,Casing kSaid .spindle havingat one nend a` crank pin which engages ya slotted handle of the switch, a'cord operated pulley loosely mounted uponthe said spindle and provided 5with a .projection or lingel.' .which lengages when .the .pulley is rotated in one direct-ion, with one or .other oi tWO 4Similar projections or ylingers ,on a l.disc

fixed to the spindle whereby the latter-is also rotated and with it .the ,cran-k pin, a projecn tion or stop formed on the pulley which is adapted to come in contact. with a similar projection or stop kon the inside of the Secondary casing and thereby prevent lany .further .rotative movement bythe crank pin.

Anelectric switch in which the switch mechanism comprises .two rotatable members mounted within vthe switch casing, ,to one oi' which is secured a frame engaging with the crank pin of .the switch operating mechanism, while the other ac tuates the contact member, arms on the said rotatable members being connected by a. `link whereby the` .switch yarm is operated, a spring coacting with the .said switch to give a quicl:r ,action thereto.

. 4.ln testimony whereof I affix my signature.

Groen `-RUDsToy :eeowar- 

